Navigation Links
Jellyfish inspires latest ocean-powered robot
Date:3/20/2012

American researchers have created a robotic jellyfish, named Robojelly, which not only exhibits characteristics ideal to use in underwater search and rescue operations, but could, theoretically at least, never run out of energy thanks to it being fuelled by hydrogen.

Constructed from a set of smart materials, which have the ability to change shape or size as a result of a stimulus, and carbon nanotubes, Robojelly is able to mimic the natural movements of a jellyfish when placed in a water tank and is powered by chemical reactions taking place on its surface.

"To our knowledge, this is the first successful powering of an underwater robot using external hydrogen as a fuel source," said lead author of the study Yonas Tadesse.

The creators of Robojelly, from Virgina Tech, have presented their results today, 21 March, in IOP Publishing's journal Smart Materials and Structures.

The jellyfish is an ideal invertebrate to base the vehicle on due to its simple swimming action: it has two prominent mechanisms known as "rowing" and "jetting".

A jellyfish's movement is down to circular muscles located on the inside of the bell the main part of the body shaped like the top of an umbrella. As the muscles contract, the bell closes in on itself and ejects water to propel the jellyfish forward. After contracting, the bell relaxes and regains its original shape.

This was replicated in the vehicle using commercially-available shape memory alloys (SMA) smart materials that "remember" their original shape wrapped in carbon nanotubes and coated with a platinum black powder.

The robot is powered by heat-producing chemical reactions between the oxygen and hydrogen in water and the platinum on its surface. The heat given off by these reactions is transferred to the artificial muscles of the robot, causing them to transform into different shapes.

This green, renewable element means Robojelly can regenerate fuel from its natural surroundings and therefore doesn't require an external power source or the constant replacement of batteries.

At the moment, the hydrogen-powered Robojelly has been functioning whilst being clamped down in a water tank. The researchers admit that the robot still needs development to achieve full functionality and efficiency; however, the potential can be seen in this video (http://www.youtube.com/watch?v=U2OSJQhHQp8) where the robot is powered by electricity.

"The current design allows the jellyfish to flex its eight bell segments, each operated by a fuel-powered SMA module. This should be sufficient for the jellyfish to lift itself up if all the bell segments are actuated.

"We are now researching new ways to deliver the fuel into each segment so that each one can be controlled individually. This should allow the robot to be controlled and moved in different directions," Tadesse continued.

This study is part of the MURI program sponsored by Office of Naval Research.


'/>"/>

Contact: Michael Bishop
michael.bishop@iop.org
44-117-930-1032
Institute of Physics
Source:Eurekalert

Related biology technology :

1. Jellyfish Protein Shows Potential to Help With Memory
2. Jellyfish Protein Extends Neuroprotective Tentacles at Neuroscience Conference
3. Suzanne Somers, Renowned Author, Medical Advocate, and Official Spokesperson for NeoStem, Inc., Inspires the Audience on The Ellen Degeneres Show
4. Haydon Kerk Motion Solutions Inspires Next Generation of Innovators as Silver Supplier of the FIRST Robotics Competition
5. UT professors pathogen research inspires robotics design for medicine and military
6. joimax® Inspires Thai-German Neurosurgery Congress Participants for TESSYS®
7. Frustration inspires new form of graphene
8. [video] Jacques Tizabi, CEO of Universal Detection Technology Discusses Latest Purchase Order on WallSt.nets 3-Minute Press Show
9. Latest Sleep Disorder Technology Tested With SleepQuest
10. EUPROBIO 2008 Presentation to Highlight Latest Immune Research
11. Can Algae Biofuels Satisfy the World's Growing Biofuel Needs? Upcoming Webinar Shares the Latest Commercialization Strategies and Challenges
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/1/2017)...  Friends, family, healthcare teams and others provide invaluable ... chronic condition affecting the central nervous system. Four MS ... and News , Can Do MS and ... have joined biotechnology company Biogen to recognize ... MS Awareness Month, there are a variety of ways ...
(Date:3/1/2017)... ... March 01, 2017 , ... Morris South ( http://www.morrissouth.com ), ... open house, Southern Tech Fest, April 4-5 in Huntsville, Alabama. The regional machine ... and perform live metal cutting demonstrations throughout the event. More than 20 leading ...
(Date:2/28/2017)... ... February 28, 2017 , ... ... for sensitive, label-free biomolecular interaction analysis, has announced collaborations with Biosys Technologies, ... collaborators expect rapid and effective screening and ranking of inhibitors, thanks to ...
(Date:2/28/2017)... , Australie, 28 février 2017 ... internationale de technologie médicale innovante, et un prestataire ... la santé, des produits et solutions innovantes, et ... nouvelle image de marque sous l,appellation ITL Health ... fait partie du plan de nouvelle image unifiée ...
Breaking Biology Technology:
(Date:2/2/2017)... 2, 2017   TapImmune, Inc. (NASDAQ: ... specializing in the development of innovative peptide and ... cancer and metastatic disease, announced today it has ... of a second clinical lot of TPIV 200, ... alpha. The manufactured vaccine product will be used ...
(Date:2/2/2017)... TOKYO , Feb. 1, 2017  Central ... innovative and meaningful advances worldwide, The Japan Prize ... Japan Prize, who have pushed the envelope in ... Information and Communication. Three scientists are being recognized ... outstanding achievements that not only contribute to the ...
(Date:1/31/2017)... Jan. 31, 2017  Spero Therapeutics, LLC, a ... the treatment of bacterial infections, today announced it ... candidates from Pro Bono Bio Ltd (PBB) to ... multi-drug resistant forms of Gram-negative bacteria.   The assets ... Ltd, a PBB group company. "The ...
Breaking Biology News(10 mins):